Egg carton



May 8, 1928. 1,669,226

F. D. BERRY EGG CARTON Filed Oct. 1927 2 Sheets-Sheet 1 INVENTOR Frggzk Z7. 32:

ATTORNEYS May 8, 1928. 1,669,226

- F. D. BERRY EGG CARTON Filed Oct. 6, 1927 2 Sheets-Sheet 2 1 2F 8 INVENTOR 5 Frank wry m I I: I

ORNEYS Patented May 8, 1928.

UNI'VI'ED STATES FRANK D. BERRY, OF NEW YOlf-K, N. Y.

EGG CARTON.

Application me October 0, 1921. Serial No. 224,399.

My invention relates to improvements in egg cartons of the type consisting of a cellforming filler enclosed in a wrapper, and

resides particularly in improvements in the i wrap er.

It as been proposed to make such wraprs of a blank of cardboard material hav- 1ng"transverse bending. corrugations and longitudinal corrugations for locking the filler in place. These wrappers are open to two objections; namely, that in the forma tion of the corrugations the material is fractured because of the inability of cardboard to stretch, and that, after formation, since the corrugations intersect, it is impossible to,

sate for the bending. But since in the formation of such joints as well as in the formation of the corrugations, the paper is subjected to the same stresses as m the prior art, it is open to the same objection as are the devices of the prior art.

-' My invention therefore contemplates the manufacture of such wrappers from a Inrality of plies of expansible paper of w ich the common type is crepe paper. In manu- 40 facturing from this type 0 paper the paper is bound in superimposed layers with waterproof glue such as silicate of soda, and while the glue is still wet, the paper is subjected to an embossing operation heat being simultaneousl applied. The object of embossing whi e the glue is wet is to take advantage of the fact that, in thatstate, there will be slippage between the various plies so that allowance can be thereby made for the greater expansion necessary for the material on the outside of the convexed surfaces.

If no slippage were allowed the outside layers would have to stretch more than the inside layers and might be broken. Furthermore, the fact that the paper is expansible permits all the layers to. stretch over curved surfaces. This fact is due, of course, not to stretch ng of the paper, but rather to the smoothing out of the crinkles that are present 1n creped paper. The finished article presents a substantially smooth appearance.

My 1nvention further contemplates the provislon of egg su porting embossed portions on the top an bottom portions of the glrapper to positively hold the egg between invention further contemplates the slitting of the ends of the bending lines of the wrapper, thereby allowing the side edges of the wrapper to be turned in over the ends of the filler, to hold the filler from longitudinal motion. I

It must be noted that, as before stated, the fact, that paper will not stretch, renders t useless for the manufacture of wrappers mvolvmgembossing in two directions for the reason that it will inevitably break and render the product undesirable for use. I have found, after exhaustive research, that the use of the above described multi-ply expansible paper is the only means by which such objections can be overcome. Wrappers made according to my invention are strong, flexible, light, cheap and weatherproof. My invention further contemplates such improvements and advantages as will appear from the following detailed description of the drawings in which Fig. 1 is a perspective view of the wrapper in use.

Fig. 2 is a cross-section along the line 2-2 of Fig. 1 with the wrapper completely folded.

Fig. 3 is a longitudinal section along 3-3 of Fig. 1 with the wrapper folded.

Fi g. 4 is a sectionthrough one of the bending oints.

Fig. 5 is a plan view of the wrapper in open position.

Fig. 6 is a section through the line 6-6 of Fig. 5.

Fig. 7 is a section through the line 7-7 of Fig. 5.

Fig. 8 is a detail of the wrapper showing the multi-ply construction.

Referring to the drawings in particular, Fig. 1 shows an egg carton consisting of a cell-forming filler 1 made up of transverse III 'walls 2 having vertical slits in the center 11.

and adjacent both ends, and longitudinal walls 3 of less height than the transverse walls, and having vertical slits at mtervals whereby each longitudinal wall may be connected with a plurality of transyerse walls by mutual engagement of the sl1ts. When assembled the transverse walls project beond the longitudinal walls at the top and bottom and sides. This cell-forming structure is enclosed by a wrapper 4shown more clearly in Fig. 5 wherein 5 are outwardly embossed transverse corrugations, and 6 are outwardly embossed longitudinal corrugations. At the points of intersection of said corrugations are inwardly pressed concavities shownin section in Figs. 4 and 6. Because of the concavities when the wrapper is bent, the outer layer of the longitudinal corrugation which would ordinarily be subjected to the greater stress is not subjected to any stress. Referring to Fig. 5 it will be seen that the wrapper is divided by the bending lines into bottom portion 8, top portion 9, end portions 10, and flap 11. All these portions are divided 'into sections by the longitudinalcorrugations which are equal in number to the transverse walls of the cell-forming filler and in position to receive the ed es of said walls when said cell-forming ller is enclosed by the wrapper.

In each of the sections of the top and bottom portions set oil by such longitudinal corrugations are a pair of egg supporting embossed portions 12 in similar positions. These egg supporting portions as shown in section in Fig. 3 consist of convexed ortions 13 pressed inwardly, the centers of w ich are concaved, forming pockets 14 for receiving ends of eggs. The end portions of the bending corrugations 5 are slit as at 15 whereby when the wrapper is folded the side edges thereof may be bent inwardly as shown in Fig. 3 to form stops for the enclosed filler. The wrapper has at its extreme ends, corresponding slits and tongues to provide closure means in the well-known manner.

The wrapper as shown in Fig. 8 is made of three plies of material, A, B and O. The center ply is usually heavier than the outer plies, but may be of the same weight. Whatever be the weight of the plies, which is a matter of choice, they all must be of expansible paper such as crepe paper in order that the product will be satisfactory. The number of plies may be increased as desired.

The ordinary method of making the wrapper is to supply the plies of paper from separate rolls, coat both sides of the inner plies with glue, preferably sodium silicate solution, collate the plies by passing them in superimposed relation between presser rollers, cut the laminated structure so formed into desired lengths, place each length on an embossing plate while the glue is still wet and emboss thereon the desired portions, at the same time applying heat whereby the wrapper is stiffened in embossed form.

In using the wrapper in connection with a filler, the filler is placed on the bottom portion with its transverse walls in the longitudinal corrugations 6, the end walls 10 are bent upwardly with their corrugations en aging the side edges of the transverse wfils of the filler, eggs are placed on end in the egg supporting portions of the bot-- tom, the top is brought down with its corrugations 6 engaging the upper edges of the transverse walls of the tiller, and its egg supporting portions engaging the top ends of the e gs, the flap is closed and the side edges of the wrapper are turned inwardly as shown in Fig. 3.

As can be seen, by the use of my wrapper, the eggs are positively held from contact with any surface and with each other, and the filler is locked in place and cannot be propelled from the side of the closed wrapper by a sudden thrust in that direction, to which thrust such a carton is frequently subj ected, because of the turned in side portions of the wra per.

Having t us fully described and explained the manufacture, construction and advantages of my device, what I wish to claim as new and protect by Letters Patent is 1. In an egg carton made up of a cell forming filler enclosed in a wrapper, a wrapper having intersecting corrugations, said wrapper being made up of a plurality of plies of expansible aper adhesively secured in superimposed re ation.

2. In an egg carton made up of a cell forming filler enclosed in a wrapper, a wrapper having top, bottom, and side portions, and a plurahty of inwardly directed egg supporting members on said bottom portion, each comprising a convex embossed portion having a concavity at its center, sald wrapper being made up of a plurality of plies o 'expansible paper adheslvel cured in superimposed relation and sai e g supporting mem composite plies.

3. In an egg carton made up of a cellforming filler enclosed in a wrapper, a wrapper comprising a. blank made of a plurality of plies of expansible paper and havlng outwardliyl' embossed corrugations runmng longitu 'nally and transversely thereof, the points of intersection of said corrugations being ressed inwardly to form un reakable ben ing points.

4. In an egg carton made up of a cellforming filler enclosed in a wrap er, a wrapper having longitudinal outwardly embossed corrugations forming locking means for the transverse walls of the cell-forming filler and bending lines comprising transverse outwardly embossed corrugations iners being embossed on t e tersecting said longitudinal corrugations, the points of intersection of said corrugations being concaved whereby such points will not break when the blank is bent on its bending lines.

5. In an egg carton made up of a cellforming filler enclosed in a wrapper, a wrapper consisting of a blank having transverse bending lines dividing it into top,bottom and side portions and comprising out wardly embossed corrugations, longitudinal outwardly embossed corrugations forming locking means for the transverse walls of the enclosed filler, and concavities at the intersections of the bending and locking corrugations whereby breakage at such points when the blank is bent is prevented.

6. In an egg carton made up of a cellforming filler enclosed in a wrapper, a

wrapper consisting of a blank having transverse bending lines dividing it into top, bottom and side portions and comprising outwardly embossed corrugations, longitudinal outwardly embossed corrugations forming locking means for the transverse walls of the enclosed filler, and inwardly embossed egg supporting portions on the top and bottom portions, said blank being made up of a plurality of plies of -expans1ble paper adhesively secured in superimposed position whereby the embossed portions may be formed without rupturing the said blank.

7. In an egg carton made up of a cellforming filler enclosed in a wrapper, a wrapper comprisin a blank having bending lines dividing it into top, bottom and side portions and a flap, outwardly embossed longitudinal corrugations formin locking means for the transverse walls 0 the cellforming filler, said bending lines consisting of outwardly embossed corrugations which intersect the longitudinal corrugations, and inwardly embossed concavities at the points of intersection whereby breakage at such points is lprevented when the blank is bent said blan being wider than the length oi said filler and having the ends of its bending lines slit whereb when the filler is enclosed therein thesi e edges of the wra per may be turned inwardly to lock the er from longitudinal motion.

In testimony whereof I my hand.

FRANK D. BERRY.

have hereunto set 

